I've bought the early release complete build to just start riding soon and full intentions to upgrade later, if and when I master the bike. I am not very experienced, especially with road bike components, but I'll try do say something anyway. Big pinch of salt.
I find shifting in the front and counter shifting in the back simultaneously is made very comfortable by the brifters with thumb button, because I can shift up multible gears in the rear, when I shift down a gear in the front. I need to be careful, though, otherwise I might throw the chain off the chainrings. Otherwise no problems with shifting.
The brake disks were pretty warped (shipping from the Asian factory to the cruzbike warehouse, to the Dutch reseller, to me in Germany). On my first try of straigtening them and setting up the calipers so they just barely not rub, I don't get as much Stopping power, before the brake lever is blocked by the handle bar. Maybe I would neet to put them higher, I will certainly try to get the disks straighter and the calipers tighter. Hydraulics with a firm stop when the calipers are closed would probably mitigate.
I can't judge the wheels, especially their weight. But they have a brake track on the rim, despite being on a disk brake bike. And they are very shallow. There's probably some aero gains to be had.
When adjusted right, it is probably all fine, just not quite high end. A base to grow from, when you want to upgrade later (if buying the frameset AND high rnd components would be too much for your wallet right now or you want to start riding first). But if you want high end and have the time and money now, build it up as you want! (And if you are certain you won't ruin your expensive components with beginner mistakes or end up unable to learn to ride your new dream bike, as I was worried.)
